BMW X3 vs BMW X4

What's the difference?

The X3 xDrive30e is a sporty SUV with fantastic ride quality and slick driving characteristics, although its specs seem a bit behind on the electrified front despite it being the most expensive PHEV of its peers.

This leaves it with an odd split personality of being particularly limited to tight city driving to make the most of its EV features, while its engaging nature beckons more to the open road than some of its rivals. A jack of two worlds perhaps, but a master of neither.

Okay, so the BMW X4 xDrive30i is neither an ass nor an elbow, to be fair, it's more of a bulky shoulder muscle, or two.

I can't say I'll ever love the X4, the idea of it is a bit too weird for me, but I can't help admiring the way it looks and the way it drives.

It's a bit like a sedan on steroids - or an SUV on a diet, depending on your perspective - but that doesn’t take away from the fact that it’s fun to drive, comfortable and retains just enough coolness, and just enough practicality, to make it worthwhile.

The X3 is iconic BMW, having come to be the face of the brand for many buyers, the mid-size SUV exemplifies the Bavarian marque’s ‘kidney grille’, sharp and tall lines, and strongly defined body.

It’s part dainty luxury car and part buff Germanic tourer in equal measure. Suffice it to say fans of the brand will love it, but it’s not going to make converts of anyone else.

Newer design elements which adorn the X3’s body include the striking tail-light design, and little plastic fills below which combine with its contrast bumper and dual-exhaust ports to make for a sporty looking SUV.

The wheels look enormous and add enough chrome to the picture to keep it looking sleek, while subtle badgework has always been a hallmark of a good BMW.

BMWs have always had a relatively minimalist take on the interior design, and overall this is a space in which progress has been made at a glacial pace throughout the brand’s history, wild 7 Series limos being the exception to the rule.

This means the X3 gets the iconic centre-panel, ever so slightly oriented to the driver which houses the two centre air vents and climate control buttons, and a small panel below which houses the volume knob and shortcuts for the radio.

The digital revolution has very much come to the interior of this SUV though, as the top of the dash is adorned with a single enormous panel, and a second one set in the instrument binnacle in a classic fashion. It will all be quite familiar, even if you’ve skipped a BMW generation or two.

The wheel is a key touchpoint, clad in a lovely soft padded leather but with a chunky three-spoke design and massive notches at 10 and two for you to rest your hands on.

I don’t like this wheel in the brand’s more dainty sports cars like the Z4 where it feels too big, but it definitely feels at home in the X3.

Quality materials with plenty of soft-touch plastics and leather trims extend their way into the door, while the software is appealing in its design and fast to respond; clearly backed by strong hardware.

A final thing worth noting is the X3 has one of the more dated interiors in the BMW range. While it has been augmented with digital upgrades over the years, it doesn’t feel as contemporary as the incoming range of cars with the next-gen design elements. Take a look at the iX’s spectacular interior for what you’re missing out on.

So here's the thing. Obviously I have a personal beef with the existence of vehicles like this, but my eyes cannot deny the facts - the X4 looks fantastic. It's muscular, imposing and smooth all at once. Unlike the X6, a bigger and less visually successful attempt to play the same styling tricks with an X5, it doesn't have a ridiculous rear view that looks like it shoulders and buttocks have been fused (although it's hard to miss just how small the rear window is).

Even more impressively, there's no denying it looks better than the X3 that gave birth to it, so I can easily see why someone in a BMW showroom could be drawn to it. At least until they sit inside.

If the exterior style and eye-catching Sophisto Grey metallic paint don’t make an immediate impression then your eyes will surely widen at the interior, resplendent with bold Tacora Red seats, Aluminium Rhombicle trim finisher and the kind of sleek, classy styling that BMW excels in. 

Both the adjustable ambient lighting on the doors (we were partial to lilac) and door projectors that shot out what looked like robot wings onto the ground every time we hopped out of the X4 at night walked a fine line between futuristic cool and “parked out the front of a nightclub entrance” chintz, but over time the scales tipped more to the former. 

The big differentiator between the X4 and X3, of course, is the sloped coupé roof, a design feature that may make the X4 look a little cooler, but at the expense of cabin space, but more of that in a moment.

The X3 is reasonably large on the inside, with a commanding road view and healthy space for an adult in both front seats. The tall roofline leaves plenty of room for someone my 182cm height, while leather-clad soft-touch finishes are present for your elbows and knees.

There’s a large bottle holder and thin bin in each of the front doors, and a wide centre console with a further two bottle holders with adjustable ridges and a large storage bay suitable for a phone below the climate cluster.

This area also houses a USB port and a little shaped notch for you to place the key, and the whole area can be covered over with a retracting lid.

Like all BMWs there are well hidden shortcut buttons for many of the functions which integrate into the design, and there’s a multimedia screen function for most functions, too, controlled through the centre dial system, or via touch.

It’s nice to have both, unlike some Mazdas which use a similar control system, but force you to rely on the dial.

The second row looks a bit flat from a distance, but you do sink into the leather-clad seats nicely, and unlike some rivals in this category, the second row is fixed and not on rails.

Room for a 182cm tall adult is decent, with a little more than adequate knee room and excellent headroom.

The leather trims continue, and true to the sense of being a premium brand the intruding piece of wheelarch is also clad in padded leather. No touching plastic in here.

A single bottle holder appears in each of the rear doors, with a further two in the drop-down armrest, and there’s a netted pocket on the back of each of the front seats.

Rear passengers get their own climate zone with an independent control panel as well as a 12V outlet and two USB-C ports.

Luggage capacity in the boot is rated at 450-litres (VDA), significantly down on the combustion versions of this car. Note in the pictures the stepped boot floor, which is adorned with a chrome trim piece for some reason, as though the car is always reminding you of the lost room.

Still, the squared-off space managed to fit our three-piece CarsGuide luggage set with relative ease and room to spare. There is a thin and narrow slot under the boot floor which serves as a location to place your charging cables.

For a car that is very much a mid-sized SUV on the outside, the interior can feel a bit too snug, like you’re driving a compact car that’s tried on a suit a few sizes too big (for reference, I’m 175cm tall - above-average height drivers may find the snugness soon turns to claustrophobia). 

While comfortable - it is BMW we’re talking about, after all - there’s not an overly abundant amount of headroom available, a feeling that becomes more pronounced should you shut the big moon roof.

My two children felt slightly too close to “you’re annoying me” distance from one another, which is to say this isn’t really the kind of car you should be getting if you plan on regularly ferrying about passengers in the rear who are bigger than a child. But I really don't think many people with kids would choose the X4 over the X3.

Boot space also takes a hit when compared to the X3 (550 litres versus 525-litres in the X4 - I was surprised the difference wasn't larger - although that expands to 1430-litres with the rear seats folded down. 

The boot opening is also mouth-shaped, which makes packing in wide-load items more of an issue.

Cupholders are plentiful - two in the front, two in the rear, and bottle holders in each door - and there’s a decent-sized storage cubby in between the front two seats. 

The sloped roof, and big fat A pillars, also result in the X4 being a bit more pinched at the rear, which is not especially great for visibility, with the vehicle’s blind spots taking some getting used to.

Cost-wise, the X4 is roughly in the same ballpark as the other cars in this strange sub-segment, but when you add in optional extras - metallic paint, panorama glass sunroof and BMW Laserlight headlights among them - the base price of $95,900 plus on-road costs sneaks up to $101,800, which is is no small figure. 

It’s also a considerable $8000 more than the SUV-shaped X3, meaning you’re essentially getting the same car, but with less cabin and boot space, for more money. To be fair, this is just part of a long tradition of the style-conscious buyer being willing to pay more for less, one that the invention of the coupe pretty much invented.

That kind of money also makes exclusions like adaptive cruise control, heated seats and wireless charging a bit of a head-scratcher.

Still, there’s plenty to love, including an M Sport kit that comes standard with the X4 (a suspension/brake package and various styling embellishments), butter-soft Tacora Red Vernasca leather seats (Sport adjustable for the driver and front passenger), 20-inch M light alloy double-spoked wheels, a head-up display, adaptive LED headlights, and an automatic tailgate. 

There’s also a generous high-resolution 12.3-inch control display and digital 12.3-inch instrument display, the former operated by touch or via the rotary iDrive Touch Controller. 

Cable-free Apple CarPlay and Android Auto are also available, but BMW allows you the option to use its iDrive system instead, just in case you're some kind of mad Munich fanboy - or you hate Apple. 

The PHEV version of the X3 pairs the brand’s usual 2.0-litre four-cylinder turbocharged petrol engine with a relatively powerful electric motor integrated into its eight-speed torque converter automatic transmission.

On its own, the engine produces 135kW/300Nm, while the electric motor is capable of punching out 80kW/265Nm. When working together, the EV components can provide a further electrified boost, for a total of 215kW/420Nm, allowing for a 0-100km/h sprint time of 6.1 seconds. This makes the 30e only slower than the M40i and 30d variants in the rest of the X3 range.

The xDrive30e is capable of travelling up to 135km/h under electric power alone, with a surprisingly small 12kWh battery delivering around 41km of pure EV range.

As the electric motor is mounted in the transmission it is capable of driving all four wheels via the brand’s 'xDrive' system with torque vectoring.

Somewhat amusingly, the German documentation for the X3 includes a section for “off road characteristics” (I suppose it is an SUV after all…) and for those interested the xDrive30e can ford at up to 500mm depth, has an approach angle of 25.6 degrees, a departure angle of 22.8 degrees, a breakover angle of 20.0 degrees and a ground clearance of 204mm. Enjoy the trails.

Now, prepare to be confused. In the past, the 3.0 in the xDrive3.0i nomenclature might have led you to believe you'd bought a BMW with a 3.0-litre straight six engine. But in this case, you have not, the 3.0 just means you have a more exciting version of the 2.0; a TwinPower turbo 2.0-litre inline four-cylinder engine, making 179kW and 353Nm that the xDrive system delivers to all four wheels. 

The claimed zero to 100km/h time of 4.9 seconds feels completely realistic as this engine has plenty of poke. Put it in the Sport setting and you'll get some serious shove. Indeed, the switch between Comfort and Sport is very noticeable and changes the character of the car entirely.

The transmission is an eight-speed conventional torque converter automatic gearbox that’s both smooth and responsive. 

Here’s the tricky bit. The X3 xDrive30e has an official combined fuel consumption of just 3.2L/100km, but this will depend heavily on how you drive it.

You see, the BMW hybrid system is very keen to drive under electric power alone, even in the so-called ‘hybrid’ driving mode. This will mean you will extinguish the battery’s 41km driving range (or 35km according to our test vehicle on a full charge) quite quickly, whether you like it or not.

Plus, the charging capability is a bit slow. At 3.7kW, the PHEV X3 charges its 12kWh battery up in 2.6 hours on a faster public outlet or garage wall box, or around five hours on a wall socket.

To put it in perspective, the Lexus NX 450h+ showed me nearly double the amount of electric driving range on a single charge (65km as-tested) and was capable of charging up at a rate of 7.2kW, meaning a two hour flat charge for twice the range on a public outlet.

The summary boils down to: If you charge up at home, this won’t be as much of a problem, if you need to rely on public charging, it could make a difference to the PHEV you pick.

You can prolong the life of the battery using the ‘battery level’ mode which lets you set a target for battery life and have the car switch to primarily combustion at that point.

This can come in handy if you have a lot of open-road driving, and want to conserve the battery for driving around town where it is most efficient.

On my week with the car I saw an impressive consumption figure of 2.2L/100km according to the trip computer, under the official number, while my energy consumption came in at 20.7kWh/100km against a claim of 16.4kWh/100km. I did make sure to charge the car up at every opportunity, however.

Like all BMWs the X3 xDrive30e requires mid-shelf 95RON unleaded fuel, and has a 50L fuel tank despite the addition of its high-voltage battery.

The X4’s 65-litre tank needs to be 95-octane at a minimum, and BMW’s claimed combined fuel consumption is 7.9 litres per 100km. The temptation to use its rorty little engine is going to push you higher, though - you chose the one with the 3.0 badge on it after all - and we averaged 10.9 litres per 100km in our week together, which was mainly city driving, to be fair. 

One of the things I came to love most about this version of the X3 is how seamless the hybrid system is, and how unusually quiet and comfortable this car proved to be.

Sure, it’s a luxury mid-size SUV, but I came away particularly impressed with how the adaptive suspension tune pairs so nicely with the electrified acceleration to make for a sleek driving experience.

Despite its dimensions, the xDrive30e feels light and springy over bumps, filtering out the worst of the road while keeping a good level of control at the wheels.

The stock steering tune in the car’s standard ‘hybrid’ driving mode is nice and light, too, making this mid-sizer feel smaller than it really is to pilot, and you don’t feel the extra weight of the battery pack at all.

The combustion engine is so quiet it is at times difficult to tell when it enters the mix, aside from the fuel consumption meter on the dash suddenly coming to life.

It too is a smooth unit, providing partially electrically-assisted acceleration in most modes which makes it hard to tell when the transmission changes cogs. It’s as though you get the best of both worlds this way.

The car is a bit too keen to rely on its electric driving, and, as mentioned earlier, this will mean it drains its battery relatively quickly unless you take extreme measures like the battery saver mode.

The result is a car which is far better suited to shorter city-based journeys than long tours through the country. At least the turbocharged engine and BMW driving dynamics are left intact should your battery run dry.

The regen braking is mild (able to recoup a max of 20kW at any given moment), although the indicators on the dash are neat for letting you know the limit of your electric acceleration and how far you’ve travelled without using the combustion engine.

On my week with the car I managed over half the distance with the engine completely off. Think of the fuel savings.

Elsewhere the X3 offers great visibility thanks to a boxy shape with big windows, and solid electric acceleration, with decent handling, too. I’d say it feels sportier than the Lexus NX or Merc GLC equivalents, with the ride a bit more forgiving than that of the Volvo XC60 Recharge.

As an EV then the xDrive30e is notably limited, but as an SUV which threads the needle of being both engaging and comfortable, it’s possibly the best of the current premium mid-size SUV PHEV pack.

The impressive trick that BMW continually pulls off with its SUVs is giving them the same sensual, muscular steering as its sedans, and an impressively similar ride and handling balance.

The steering is the highlight here, but it's also noticeable how planted to the road it feels.

The X4 speaks to its looks, in fact, by feeling sportier and more alive to drive than you'd expect an X3 to be.  

This is less an SUV for soccer mums and dads, and more a bastard love-child that’s into loud leather and bright neon - a CEO who dressed punk rock-lite on weekends, if you will. 

If those weekends are bereft of child taxiing and loading up the boot with several tons of kid stuff, then you’ll have a blast in the X4. 

A 2018 test gave the X4 a five-star ANCAP safety rating, and an easily located button on the dash brings up the vehicle’s safety suite if you’re the kind of driver who likes to make a few adjustments. 

A 360-degree camera offers multiple viewpoints and is a godsend when parking the X4, since the cabin makes the car feel smaller than it actually is on the outside, and the range of safety features on offer are more than adequate. 

Those include autonomous emergency braking, dynamic braking lights, dynamic stability and traction control, rear-cross traffic alert, speed limit information and hill descent control. 

BMW languishes with just three-years of warranty coverage. The brand along with its Mini subsidiary has become a notable laggard in the space now, its last remaining Audi rival has moved on to match the five-year and unlimited kilometre promise of its VW parent.

Servicing on BMW models is ‘condition dependent’ meaning the car’s computer will keep track of when servicing needs to happen based on how the car is driven and other factors.

A five-year ‘basic’ service pack is available inside the first 12 months of purchase and covers visits inside this period or 80,000km whichever occurs first. It costs $2010, or $402 a year.

Despite all the brouhaha about other car manufacturers offering more generous warranty periods - seven years for Kia, for example - BMW has not shifted its stance, still offering its standard three-year unlimited-kilometre warranty. Frankly, it's just not good enough.

BMW also offer a Service Inclusive package for $2010 that covers owners for five years, or 80,000km.